What is a solvent?
a
The material that is dissolved
b
The material that increases the speed of the dissolution
c
The material that reduces how much can be dissolved
d
The material that is dissolving another material
Question 2 (1 point)
Which of the following phase changes involves a gas turning into a liquid?
a
Condensation
b
Boiling
c
Sublimation
d
Freezing
Question 3 (1 point)
If you keep a gas's temperature constant, how would you increase the volume of the gas?
a
You would change the temperature
b
You would increase the pressure
c
You would decrease the temperature
d
You would decrease the pressure
Question 4 (1 point)
If you only wanted to increase the particle motion of gas without increasing any of its other properties, which would be the most correct situation?
a
Keep the gas at constant pressure and keep the temperature constant, but increase the volume of the gas
b
Keep the gas in a fixed container at constant pressure and increase the temperature
c
Keep the gas in a fixed container at constant pressure and decrease the temperature
d
Keep the gas at a constant volume and keep the temperature constant, but decrease the pressure of the gas
Question 5 (1 point)
What is supersaturation?
a
Supersaturation occurs when a different solvent is added to a solvent, increasing how much can be dissolved
b
Supersaturation occurs when natural water dilutes a solvent that also dissolves the solute at the same time
c
Supersaturation occurs when a solvent's temperature is increased to increase the dissolving amount, then cooled to a normal temperature
d
Supersaturation requires the use of powered solute, to increase the saturation point beyond the normal maximum
Question 6 (1 point)
Which of the following acids would have the highest electronegativity?
a
PH3
b
HCl
c
H2SO4
d
H2S
Question 7 (1 point)
What is the major difference between the particles in a liquid and a gas of the same substance at the same temperature?
a
The particles in the gas are moving faster than the particles in the liquid
b
The particles in a liquid are still connected, but the particles in a gas have separated from each other and now fly around to fill the container
c
The particles in the liquid have higher masses than the particles in the gas
d
The particles of the gas are separated, so they absorb less heat than normal, which is why gases are typically cooler than liquids
Question 8 (1 point)
What makes a compound an acid?
a
It dissolves into Hydrogen ions in water (H+ and H3O+)
b
It has a pH higher than 7
c
It dissolves into Hydroxide ions in water (OH-)
d
It cannot be mixed with oil
Question 9 (1 point)
What makes a compound a base?
a
It dissolves into Hydrogen ions in water (H+ or H3O+)
b
It has a pH lower than 7
c
It dissolves into Hydroxide ions in water (OH-)
d
It cannot be mixed with oil
Question 10 (1 point)
In the solution of sugar water, sugar is the and water is the.
Blank 1:
Blank 2:
Question 11 (1 point)
A gas becomes more soluble in a liquid when the pressure of the system is decreased.
True
False
Question 12 (1 point)
Which best describes solubility?
a
the speed at which a substance dissolves
b
the temperature at which substances become a mixture
c
the ability of one substance to dissolve in another
d
the amount of surface area per a given mass
Question 13 (1 point)
As temperature increases, the solubility of a solid solute increase.
True
False
Question 14 (1 point)
Match each term to its correct description.
Column A
1.
Concentration:
Concentration
2.
Saturated Solution:
Saturated Solution
3.
Unsaturated Solution:
Unsaturated Solution
4.
Supersaturated Solution:
Supersaturated Solution
Column B
a.A solution that holds less solute than is possible at a given temperature. More solute can dissolve.
b.The amount of one substance in a certain volume of another substance.
c.A solution with as much dissolved solute as it can hold at a given temperature. No more solute can be dissolved.
d.A heated solution that holds more dissolved solute than is possible at a lower temperature.
Question 15 (1 point)
Red cabbage contains a water-soluble pigment. In a highly acidic solution, the pigment turns bright red, and in a moderately acidic solution, it turns pinkish. In a highly basic solution, the pigment turns yellow and is a moderately basic solution, it turns bluish.
A student makes a pH indicator from red cabbage that has a reddish-purple color with a pH of approximately 7. The student pours the same amount of the cabbage solution into each of four different beakers. He then adds a different household solution to each of the four beakers until a color change is obtained. His results are shown in the table below.
The student finds the following chart online from someone else’s cabbage pH indicator investigation.
Based on the information in the passage, which household solution has the highest pH?
a
drain cleaner
b
window cleaner
c
club soda
d
lemon juice
Question 16 (1 point)
The water from hot springs near the Ebeko volcano in the Pacific Ocean has a very low pH.
Does a low pH indicate which of the following about the water?
a
It has high concentrations of OH- ions.
b
It has no detectable H+or OH- ions.
c
It has high concentrations of H+ ions.
d
It has equal concentrations of H+ and OH- ions.
Question 17 (1 point)
A student was assigned to take water samples from a lake near his home. He measured the pH of one of the water samples to be 6.0. Which of the following best describes this sample of water?
a
highly acidic
b
highly basic
c
slightly acidic
d
slightly basic
e
neutral
Question 18 (1 point)
Of five different laboratory solutions, the solution with the highest acidity has a pH of
a
3
b
5
c
11
d
12
e
7
Question 19 (1 point)
Substances are classified as acidic, basic, or neutral. The pH scale can be used to classify a substance. Which feature suggests that a substance is basic?
a
The pH is 7.
b
The pH is 0.
c
The pH is greater than 7.
d
The pH is less than 7.
Question 20 (1 point)
This is a pH chart of common materials.
Which substance is the most basic?
a
Cola
b
Cheese
c
Baking Soda
d
Bleach
Question 21 (1 point)
Look at the solution in the beaker below and identify the solution.
a
The solution is a weak acid.
b
The solution is a strong acid.
c
The solution is a weak base.
d
The solution is neutral
e
The solution is a strong base.
Question 22 (1 point)
On the pH scale, a pH of is neutral.
Blank 1:
Question 23 (1 point)
Which change of state does not require the addition of energy?
a
Vaporization
b
Melting
c
Condensation
d
Sublimation
Question 24 (1 point)
As a sample of water turns to ice,
a
new molecules are formed.
b
the mass of the sample is increased.
c
the arrangement of the molecules changes.
d
energy is absorbed by the molecules.
Question 25 (1 point)
Which state of matter would have the highest kinetic energy?
a
Solid
b
Gas
c
Liquid
3 answers
1 answer